mirror of https://github.com/odrling/Aegisub
68 lines
1.6 KiB
Plaintext
68 lines
1.6 KiB
Plaintext
|
dnl AC_CPP_PRAGMA_ONCE
|
||
|
|
dnl - check for #pragma once
|
||
|
|
AC_DEFUN([AC_CPP_PRAGMA_ONCE], [{
|
||
|
|
AC_MSG_CHECKING([[whether $CPP supports #pragma once]])
|
||
|
|
AC_PREPROC_IFELSE(
|
||
|
|
[AC_LANG_PROGRAM([[#pragma once]])],
|
||
|
|
[
|
||
|
|
AC_MSG_RESULT([yes])
|
||
|
|
AC_DEFINE([HAVE_PRAGMA_ONCE], [1], [Preprocessor support for #pragma once])
|
||
|
|
],
|
||
|
|
[AC_MSG_RESULT([no])])
|
||
|
|
}])
|
||
|
|
|
||
|
|
dnl AC_C_FLAG([-flag])
|
||
|
|
dnl - check for CFLAG support in CC
|
||
|
|
AC_DEFUN([AC_C_FLAG], [{
|
||
|
|
AC_LANG_PUSH(C)
|
||
|
|
ac_c_flag_save="$CFLAGS"
|
||
|
|
CFLAGS="$CFLAGS $1"
|
||
|
|
AC_MSG_CHECKING([[whether $CC supports $1]])
|
||
|
|
AC_COMPILE_IFELSE(
|
||
|
|
[AC_LANG_PROGRAM([[]])],
|
||
|
|
[
|
||
|
|
AC_MSG_RESULT([yes])
|
||
|
|
m4_if([$3], [], [], [
|
||
|
|
CFLAGS="$ac_c_flag_save"
|
||
|
|
$3
|
||
|
|
])
|
||
|
|
], [
|
||
|
|
CFLAGS="$ac_c_flag_save"
|
||
|
|
AC_MSG_RESULT([no])
|
||
|
|
$2
|
||
|
|
])
|
||
|
|
AC_LANG_POP(C)
|
||
|
|
}])
|
||
|
|
|
||
|
|
dnl AC_C_FLAG([-flag])
|
||
|
|
dnl - check for CFLAG support in CC
|
||
|
|
AC_DEFUN([AC_GCC_VISIBILITY], [{
|
||
|
|
AC_MSG_CHECKING([[whether $CC supports GCC visibility]])
|
||
|
|
# always use Werror since visibility is sensitive
|
||
|
|
# doesn't work on anything other than gcc either way, so Werror is fine...
|
||
|
|
vis_type="$1"
|
||
|
|
save_cflags="$CFLAGS"
|
||
|
|
CFLAGS="$CFLAGS -fvisibility=$vis_type -Werror"
|
||
|
|
AC_LINK_IFELSE(
|
||
|
|
[AC_LANG_SOURCE([[
|
||
|
|
int a() __attribute__((visibility("default")));
|
||
|
|
int b() __attribute__((visibility("hidden")));
|
||
|
|
int c() __attribute__((visibility("internal")));
|
||
|
|
|
||
|
|
int a() { return 1; }
|
||
|
|
int b() { return 2; }
|
||
|
|
int c() { return 3; }
|
||
|
|
|
||
|
|
int main() { return a()+b()+c(); }
|
||
|
|
]])],
|
||
|
|
[
|
||
|
|
AC_MSG_RESULT([yes])
|
||
|
|
AC_DEFINE([HAVE_GCC_VISIBILITY], [1], [Compiler support for GCC visibility attributes])
|
||
|
|
save_cflags="$save_cflags -fvisibility=$vis_type"
|
||
|
|
],
|
||
|
|
[AC_MSG_RESULT([no])]
|
||
|
|
)
|
||
|
|
CFLAGS="$save_cflags"
|
||
|
|
}])
|
||
|
|
|